Affine - Lead Full Stack Software Developer

Job Description :We are looking for a highly skilled Lead Full Stack Software Developer to join our Loyalty Platform engineering team. The ideal candidate will primarily focus on building and maintaining scalable Java/Spring Boot microservices that power reward earn/burn calculations, event-driven systems, and loyalty transaction processing.The role involves developing high-performance backend systems while also contributing to React/TypeScript-based frontend applications that deliver loyalty experiences to travelers across multiple platforms. This position requires strong expertise in distributed systems, event-driven architecture, cloud-native applications, and modern frontend development.The ideal candidate should be self-driven, comfortable working in agile product environments, and capable of owning services end-to-end including development, testing, deployment, monitoring, and production support.Key Responsibilities :- Design, develop, and maintain scalable backend microservices using Java 17+ and Spring Boot 3.x- Build robust APIs and event-driven systems for loyalty earn/burn workflows and transaction processing- Develop and optimize PostgreSQL queries using JOOQ for type-safe SQL operations- Work with Apache Kafka for real-time event streaming, message processing, and asynchronous workflows- Implement Kafka best practices including Avro serialization, Schema Registry usage, retry handling, and DLQ patterns- Integrate and manage AWS messaging services including SQS and SNS- Design and implement caching strategies using Redis- Build secure and scalable REST APIs using OpenAPI/Swagger standards- Participate in system design discussions, architecture reviews, and technical decision-making- Ensure code quality through unit testing, component testing, and automated CI/CD pipelines- Troubleshoot production issues and contribute to monitoring, logging, and observability initiatives using Datadog and Splunk- Optimize system performance, scalability, reliability, and fault toleranceBackend Development (Primary Focus ~70%) :- Design, develop, and maintain scalable backend microservices using Java 17+ and Spring Boot 3.x- Build robust APIs and event-driven systems for loyalty earn/burn workflows and transaction processing- Develop and optimize PostgreSQL queries using JOOQ for type-safe SQL operations- Work with Apache Kafka for real-time event streaming, message processing, and asynchronous workflows- Implement Kafka best practices including Avro serialization, Schema Registry usage, retry handling, and DLQ patterns- Integrate and manage AWS messaging services including SQS and SNS- Design and implement caching strategies using Redis- Build secure and scalable REST APIs using OpenAPI/Swagger standards- Participate in system design discussions, architecture reviews, and technical decision-making- Ensure code quality through unit testing, component testing, and automated CI/CD pipelines- Troubleshoot production issues and contribute to monitoring, logging, and observability initiatives using Datadog and Splunk- Optimize system performance, scalability, reliability, and fault toleranceFrontend Development (Secondary Focus ~30%) :- Develop and maintain frontend applications using React 18 and TypeScript- Build reusable UI components and responsive user interfaces- Work with component-based architecture, React Hooks, and state management libraries- Consume GraphQL APIs and integrate frontend applications with backend services- Collaborate with product and UX teams to deliver seamless user experiences- Maintain frontend package dependencies using npm or pnpmRequired Technical Skills :- Strong hands-on experience in Java 17+ and Spring Boot 3.x- Expertise in Microservices Architecture and Distributed Systems- Strong experience with PostgreSQL and JOOQ- Hands-on experience with Apache Kafka including :i. Avroii. Schema Registryiii. Consumer Groupsiv. Retry & DLQ Patterns- Experience with AWS SQS and SNS- Knowledge of Redis caching strategies- Strong understanding of REST API development and OpenAPI/Swagger documentation- Experience with JUnit 5, Mockito, and automated testing practices- Familiarity with CI/CD pipelines, Git workflows, and deployment automationBackend Skills :- Strong hands-on experience in Java 17+ and Spring Boot 3.x- Expertise in Microservices Architecture and Distributed Systems- Strong experience with PostgreSQL and JOOQ- Hands-on experience with Apache Kafka including :i. Avroii. Schema Registryiii. Consumer Groupsiv. Retry & DLQ Patterns- Experience with AWS SQS and SNS- Knowledge of Redis caching strategies- Strong understanding of REST API development and OpenAPI/Swagger documentation- Experience with JUnit 5, Mockito, and automated testing practices- Familiarity with CI/CD pipelines, Git workflows, and deployment automationFrontend Skills :- Strong experience in React 18 and TypeScript- Understanding of React Hooks and component-based architecture- Experience with HTML5, CSS3, and responsive design- Knowledge of GraphQL API consumption- Familiarity with npm/pnpm package managementMonitoring & DevOps :- Experience with Datadog, Splunk, or similar monitoring/logging tools- Familiarity with Docker, Kubernetes, and cloud-native deployments is a plus- Understanding of production support and incident management processesPreferred Skills :- Experience working on loyalty, rewards, fintech, or high-transaction platforms- Exposure to AWS cloud services and distributed event-driven systems- Understanding of scalable system design and performance optimization- Familiarity with Agile/Scrum methodologies- Experience in high-availability and fault-tolerant systemsSoft Skills :- Strong analytical and problem-solving skills- Excellent communication and collaboration abilities- Ownership mindset with the ability to work independently- Strong debugging and troubleshooting capabilities- Ability to thrive in fast-paced product engineering environmentsEligibility Criteria :- Experience : 8 to 10 Years- Bachelors Degree in Engineering, Computer Science, IT, or related field preferred (ref:hirist.tech)